Evolution is unproved and unprovable. We believe it only because the only alternative is special creation, and that is unthinkable.
The course of human history is determined, not by what happens in the skies, but what takes place in our hearts.
The discovery of agriculture was the first big step toward a civilized life.
Human nature, as manifested in tribalism and nationalism, provides the momentum of the machinery of human evolution.
My personal conviction is that science is concerned wholly with truth, not with ethics.
Civilization never stands still; if in one country it is falling back, in another it is changing, evolving, becoming more complicated, bringing fresh experience to body and mind, breeding new desires, and exploiting Nature's cupboard for their satisfaction.
Tribal life comes automatically to an end when a primitive people begins to live in a town or a city, for sooner or later a tribal organization is found to be incompatible with life in a city.
As long as man remains an inquiring animal, there can never be a complete unanimity in our fundamental beliefs. The more diverse our paths, the greater is likely to be the divergence of beliefs.
Man is by nature competitive, combative, ambitious, jealous, envious, and vengeful.
A drunkard is one thing, and a temperate man is quite another.
Whichever theory we adopt to give a rational explanation of human existence, that theory must take into account and explain the mental nature we see at work in all modern communities.
Before the discovery of agriculture mankind was everywhere so divided, the size of each group being determined by the natural fertility of its locality.
Christianity has not conquered nationalism; the opposite has been the case nationalism has made Christianity its footstool.
There are very few men and women in whom a Universalist feeling is altogether lacking; its prevalence suggests that it must be part of our inborn nature and have a place in Nature's scheme of evolution.
Tolerance is held to be a condition of mind which is encouraged by, and is necessary for, civilization.
Good men, whether they be Christians or rationalists, do not desire to discriminate between races, but the distinctions implanted by Nature are too conspicuous to escape the observation of our senses.
This world of ours has been constructed like a superbly written novel: we pursue the tale with avidity, hoping to discover the plot.
No tempting form of error is without some latent charm derived from truth.
In a tribal organization, even in time of peace, service to tribe or state predominates over all self seeking; in war, service for the tribe or state becomes supreme, and personal liberty is suspended.
I prize the conditions under which I have lived because they have permitted me to choose my opportunities, to inquire into such matters as interested me, and to publish what I believed to be true, uncontrolled by any central authority.
I am a rank individualist.
Civilization, we shall find, like Universalism and Christianity, is anti evolutionary in its effects; it works against the laws and conditions which regulated the earlier stages of man's ascent.
Religious leaders and men of science have the same ideals; they want to understand and explain the universe of which they are part; they both earnestly desire to solve, if a solution be ever possible, that great riddle: Why are we here?
No tribe unites with another of its own free will.
The German Fuhrer, as I have consistently maintained, is an evolutionist; he has consistently sought to make the practices of Germany conform to the theory of evolution.
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